john aston for cibse home counties north west march 8, 2006 approved documents l2a and l2b the...
TRANSCRIPT
John Aston
For CIBSE Home Counties North WestMarch 8, 2006
Approved Documents L2A and L2BThe contribution of good lighting control
2Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Contents
• A little bit about the Approved Document L• Rather more about lighting controls• Some other legislation and norms to think about• Plus bonus feature: Commissioning Code L
3Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Approved Document L2ANew buildings other than dwellings
• Not less than 45 luminaire-lumens/circuit-watt average for office, industrial and storage areas
• In other spaces initial lamp + ballast efficacy of not less than 50 lamp lumens/circuit-watt
• Local switching – now within 6 metres or twice the height of the light (whichever is larger)
• No ‘controls factor’ – the calculation tool for the Building CO2 Emission
Rate (BER) accounts for their impact• The 500W exemption has gone
4Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
• Pretty much the same as ADL2A, except:
– The ‘control factors’ are retained
Approved Document L2BWork in existing buildings that are not dwellings
Control function Factor
In a day lit space and controlled by photoelectric switch or dimming
0.90
In a space that is unoccupied for a significant time and a sensor switches lighting OFF, but ON is manual
0.90
Combining the above 0.85
None of the above 1.00
5Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Local switching – the changes for 2006
Maximum distance from switch to light: 6m or 2 x mounting
height
2
Consider switching perimeter luminaires in day lit areas separately
6Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Summarising the intent of ADL2A & ADL2B
• Improve the energy efficiency of non-domestic building by 25%
• Provide a measure that is non-prescriptive in order to allow better design
• Cover both new construction AND significant refurbishments (100m2 +)
• Meet the target CO2 emissions – now and during life• Allow compliance through certification – based on delivering
the design intended and commissioned accordingly
7Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Lighting controls are already widely used and accepted
• There are 1,000’s of lighting control installations in the UK
• Specified today on most new commercial developments
• Used in offices, public buildings, education premises, shopping malls and retail developments
8Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Energy saving
..or having the right light in the right place but only when it is needed!
9Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Time control
Energy savingAll of these control functions can reduce costs
Examples include:
-limiting light pre- and post-trading in retail applications
-changing the mode of operation
-parts of education buildings
10Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Time control
Daylight and controlled luminance
Energy savingAll of these control functions can reduce costs
Integrating daylight
-best practice uses dimming control
-use care when switching
11Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Time control
Daylight and controlled luminance
Occupancy
Energy savingAll of these control functions can reduce costs
Matching lighting in use to the numbers of people present
-all current products rely on ‘movement’
-use care when applying
12Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Time control
Daylight and controlled luminance
Occupancy
Wall switch
IR / RF wireless operation
Telephone override
PC link (TCP/IP)
Energy savingAll of these control functions can reduce costs
Used in combination with all the automatic functions to achieve:
-manual ON
-auto OFF
= better energy savings!** Ref: Moore TA, Carter DJ, Slater AI: Long-term patterns of use of occupant controlled office lighting
13Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Time control
Daylight and controlled luminance
Occupancy
Wall switch
IR / RF wireless operation
Telephone override
PC link (TCP/IP)
Logging and measuring
Energy savingAll of these control functions can reduce costs
If you don’t know how much you are using – you won’t know how much you are saving.
14Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Energy saving
• Lighting is still a significant element of a building’s electricity cost – 40% is easily possible.
• Take an unusual ‘case study’ – from 10 years ago:
• Energy Saving each year through:– dimming on the Sales Floor: £3,000.00 approx.– control in stock rooms etc: £700.00 plus
15Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Additional standards and regulations
EN12464-1 Indoor Lighting CIBSE Lighting Guides 3, 7 and….
Comfort The Workplace (Health, Safety and Welfare)
Regulations 1992 EN50172 and others
Safety
Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2 16
Controls and EN12464
..let’s take a typical modern, flexible use, office interior….
Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2 17
Controls and EN12464
Light the task area
Make sure the ‘surround area’ is
correctly litMaintain 200 lux in the
‘occupied space’
…and keep the 200 lux if someone leaves
..zoom in – and look at some of the control issues….
Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2 18
Controls and EN12464
..zoom out – and look at some more of the control issues….
Maintain safe circulation lighting
Provide ‘scene setting’
Control the light levels
Take account of daylight
Provide local control
19Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Safety and convenience
..and the emergency lighting needs testing and monitoring.
Emergency light
Exit signs
20Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
So what’s the secret of success?
• Understand the needs of the client and the staff• Draw up a specification that defines the required
functionality and performance.• List your preferred suppliers – based on your knowledge of
their abilities.• Make sure there is a full method statement for the lighting
installation.
Looking at some of this in more detail…..
21Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Understanding the application
Type of space Examples
Owned Cell office, small workshop, consulting room
Shared Open plan office, production area, ward
Temporarily owned Meeting room, ‘hot’ office, classroom
Occasionally visited Store room, book-stack, toilet
Un-owned Corridor (open or closed), stairs
Managed Hotel lounge, museum, foyer, terminal
…and each ‘day lit’ or not and ‘high or low occupancy’ leading to the appropriate selection of controls. Let’s look at some…
Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2 2256
The elements of a multi-sensor - 1
The light sensor
– the sensor looks at a square area approx 3m x 3m.
– Photo sensor with built-in colour correction filter for visible radiation (more closely matching the eye)
– Excellent linearity (better control)
– No cadmium (sustainability)– Separate sensor unaffected by
other elements or stray light ingress (no compromise)
Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2 2357
The elements of a multi-sensor - 2
Infra-red receiver
– RC5 coded solution – includes ‘self calibration’ function
as well
Push-button
– provides convenient ‘set-up’ facility to self-calibrate the light sensor (when an IR controller is unavailable)
58
Coded infra red = greater flexibility
• The ‘room flooding’ approach to IR control
• Allows multiple transmitters and receivers in an area
• 7 groups and 5 channels• Pre-set and scene setting
capability
• Interface for pushbutton control also available.
Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2 25
Normal IR control….
…each IR transmitter could offer ON, OFF and dimming
Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2 26
….using RC5 code to give personal light control…
each personal IR controller operates selected lights
room controller can set-scenes and manage all lights in the room
Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2 2761
The elements of a multi-sensor - 3
Movement sensor
– An integrated solution that gives improved sensitivity
– A 120° shade is added to allow masking of part of the detection area
– The walk test LED shines through the sensor surround
– Available in ‘Presence Detector’ only version
– Rectangular detection pattern
Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2 2862
Movement detection area
Sensor mounted at 2.5m
orientation
Sensitivity increases towards the centre
Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2 2963
Movement detection area - 120° shade deployed
Sensor mounted at 2.5m
Shaded area shows maximum screen cover
30Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
So – How do we comply with all of this?Commissioning as a solution
• Even a quick review of the process from concept to completion gives these obvious results:
– There needs to be a connection between the concept and the reality
– Everyone needs to know their role and responsibility
…which is why ‘commissioning’ became the subject of a new Code!
31Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Why do we need another ‘Code’?
Unfortunately the guides, standards, regulations and European Norms already exist – and those responsible for verification need help.
Particularly those seeking to meet ADL2A and B! ..which is why the Code received substantial Government support.
32Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Use the CIBSE Commissioning Code L: 2003
• Effective Commissioning enables and/or ensures:
– compliance with Building Regulations Approved Document L2
– compliance with all other relevant regulations / legislation
– the design intent is met
• Leading to:
– better lighting standards
– more productive and satisfied occupants
– added competitiveness for the building owner
33Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Use the CIBSE Commissioning Code L: 2003 Scope and some of the tools provided
• Covers lamps, gear, luminaires, controls, commissioning and installation issues.
• Includes– Definitions– Examples– Checklists
• Example method statement for lighting system including automatic controls
• Sample completion certificates• Safety matters• Notes about the design of lighting and
lighting control systems
34Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Approved Documents L1 and L2Declaration of conformity
Requires a ‘qualified’ person to sign– Designer and/or manufacturer
• Applies to Parts L1 and L2• Gives evidence of compliance :
– Type of equipment installed– Works identification– Method of verifying achievement– Declaration signatures
• Covers scheme design and/or installation
• Effectively ‘self-certification’
Stop press: ECA and NIC/EIC to run training courses from April 2006
35Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
The benefits of effective commissioning…a concluding summary
• Lighting system components are verified as those specified
• Substitution can only be done with the agreement of the lighting designer
• The design intent is actually delivered
• Legal and standards obligations are met
• A benchmark is set for future reference
36Lighting Controls, John Aston, March 8, 2006, CIBSE – ADL2
Final conclusion:Lighting controls help us to meet ADL2A & B
Or to put it another way…..
…I said “an Aston” – not “an Austin”…..
The revised 2006 documents confirm the importance of effectively controlled lighting in reducing carbon emissions. And the Declaration of Conformity has real additional benefits for the lighting installation!
Home Counties North West